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Old 08-12-2019, 06:44 PM   #21
Skoolie
 
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Join Date: Mar 2018
Location: Fingerlakes region NY
Posts: 190
Year: 1999
Coachwork: AmTran/Wolfington
Chassis: 3800
Engine: International DT466E 190HP variant
Rated Cap: 72 pax 29500 GVWR
Sometimes the internet is oddly coincidental/creepy. Not an hour after Id found my culprit to my problem did I receive a reply to my thread asking if Id ever figured it out! AMAZING!

I pulled the original IPR from the original HPOP. Theres a torn support o-ring behind the deepest o-ring. This Ive yet to change and reinstall everything but Im very confident that this is my issue. I will be changing the rings and IPR valve tomorrow and will let everyone know what the results are.
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Old 08-13-2019, 01:27 PM   #22
Skoolie
 
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Join Date: Mar 2018
Location: Fingerlakes region NY
Posts: 190
Year: 1999
Coachwork: AmTran/Wolfington
Chassis: 3800
Engine: International DT466E 190HP variant
Rated Cap: 72 pax 29500 GVWR
Welp that did not solve my issue. While it was necessary to replace, the IPR Valve was not the CAUSE of the no start. I pulled an oil gallery plug from the side of the block and cranked the motor over for about 5 seconds. No oil. Nothing.

*being crying*

To be honest I should checked this earlier on. It was my fault in my lackadaisical diagnostic order of operations. But AAAAAAAANYWAY....

Looks like my issue points to the low pressure piling system. Damaged/worn oil pump, damaged/loose/clogged oil pickup tube, or a damaged/worn/stuck oil pressure regulator valve.

The easiest to check would be the pickup tube (drain oil, remove pan, inspect)

Next would be the oil pump (remove crank dampen set and inspect)

Lastly it could be the regulator valve. From what I can gather there are two on this engine. One in the oil filter adapter/oil cooler housing assembly, and one next to the oil pump. The one by the oil pump is more likely to clog/be stuck but requires REMOVING THE TIMING COVER to access!

If I have to delve deep into this engine I will document and post what I find. Stay tuned!
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Old 08-31-2019, 08:43 PM   #23
Mini-Skoolie
 
Join Date: May 2019
Location: Arkansas for now..
Posts: 13
Year: 1998
Chassis: International 3800
Engine: DT466e
Rated Cap: 77
WARGEAR, did you ever find out exactly what it was? My bus is the same type and doing the same thing... It is frustrating to say the least when it just ran yesterday and now refuses to turn over. Thank you!
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Old 08-31-2019, 09:27 PM   #24
Skoolie
 
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Join Date: Mar 2018
Location: Fingerlakes region NY
Posts: 190
Year: 1999
Coachwork: AmTran/Wolfington
Chassis: 3800
Engine: International DT466E 190HP variant
Rated Cap: 72 pax 29500 GVWR
I have yet to delve into the cause. One of my symptoms is no oil pressure after having a great running engine weeks prior. Im going to be draining the engine oil, dropping the pan, inspecting the pickup and screen and analyzing what I see. If all checks out the next step will be to pull the crank damper and inspect the oil pump. If nothing comes of that Ill be pulling the front cover.
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Old 09-01-2019, 08:57 AM   #25
Mini-Skoolie
 
Join Date: May 2019
Location: Arkansas for now..
Posts: 13
Year: 1998
Chassis: International 3800
Engine: DT466e
Rated Cap: 77
Thank you for the update! I have a scanguage D on order and to be getting here on the 4th, I am hoping it is not the same problem as yours as it seems rather complex for my little brain and I am not a mechanic. I have to have this running and be gone by the 16th however and am still learning where all the parts are and what to check. Your posts have been extremely helpful! I will check the things you mentioned above and see if that is where my problem lies as well. Thank you so much for the update again.
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